The Washer,flat, cataloged under National Stock Number 5310-01-571-2425, is classified within Federal Supply Class 5310 (Nuts and Washers) of the Hardware and Abrasives group. The manufacturer of record is Mcmaster-Carr Supply Co. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5310-01-571-2425 |
| Primary Part Number | 90132A555 |
| Item Name | Washer,flat |
| FSC / FSG | 5310 / 53 — Nuts and Washers |
| Manufacturer | Mcmaster-Carr Supply Co |
| Status | ACTIVE |
| Overall Diameter | 2.250 INCHES NOMINAL IN |
| Cross-Sectional Shape Style | RECTANGULAR |
| Color | GRAY/GREY OVERALL |
| Peripheral Shape Style | ROUND |
| Material | FIBERBOARD OVERALL |
| Center Hole Shape Style | ROUND |
| Hole Diameter | 0.750 INCHES NOMINAL IN |
| Thickness | 0.110 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 90132A555 | Mcmaster-Carr Supply Co (USA) |
| Reference | Meaning |
|---|---|
| IGM22610 | 3/9 Design control — primary reference I. G. Marston Company |
NSN 5310-01-571-2425 is a Washer,flat, manufactured by Mcmaster-Carr Supply Co, classified under FSC 5310, Nuts and Washers. Status: active.
NSN 5310-01-571-2425 has 1 manufacturer part number on file: 90132A555 (Mcmaster-Carr Supply Co).
Key specifications for 90132A555: Overall Diameter: 2.250 INCHES NOMINAL IN; Cross-Sectional Shape Style: RECTANGULAR; Color: GRAY/GREY OVERALL; Peripheral Shape Style: ROUND. 8 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.